| Johnston to Mauldin (South Carolina) | 781.14 mi (1,257.12 km) |
| Johnston to Maumee (Ohio) | 519.30 mi (835.73 km) |
| Johnston to Maumelle (Arkansas) | 477.92 mi (769.14 km) |
| Johnston to Mayagüez (Puerto Rico) | 2,254.81 mi (3,628.77 km) |
| Johnston to Mayfield Heights (Ohio) | 633.50 mi (1,019.52 km) |
| Johnston to Mays Chapel (Maryland) | 907.99 mi (1,461.27 km) |
| Johnston to Maywood (California) | 1,430.85 mi (2,302.73 km) |
| Johnston to Maywood (Illinois) | 303.11 mi (487.81 km) |
| Johnston to McAlester (Oklahoma) | 480.43 mi (773.17 km) |
| Johnston to McAllen (Texas) | 1,099.13 mi (1,768.88 km) |
| Johnston to McCalla (Alabama) | 685.45 mi (1,103.12 km) |
| Johnston to McComb (Mississippi) | 743.91 mi (1,197.21 km) |
| Johnston to McDonough (Georgia) | 773.52 mi (1,244.87 km) |
| Johnston to McFarland (California) | 1,431.55 mi (2,303.85 km) |
| Johnston to McHenry (Illinois) | 282.27 mi (454.28 km) |
